Shoujo Jihen

Fena, a girl who has lived her whole life as an assassin. Her next target is Eve, the manager of a café. One night, she ambushes Eve and attacks him in an alley, but fails, and is recruited by the café's waitress. Although he cannot grasp the true intentions of Eve, who hires him knowing that he is an assassin, he infiltrates the cafe as a waitress in order to kill her when he sees an opportunity. A hit girl and a café manager, their fates intersect in this intense noir suspense. (Source: Kodansha, translated)